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ASP.NET / VB / REGEX: Convert dashes to bullets if at beginning of line

Posted on 2012-04-11
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Last Modified: 2012-06-27
I want to replace a dash with a bullet if it is at the beginning of a line.

The problem with my code is that it does not work on the first line.  It works for all lines except the first line.

This:
- Hello world
- This is a test
- Item XYZ

Should become this:
• Hello world
• This is a test
• Item XYZ

 
input = RegularExpressions.Regex.Replace(input, VbNewLine + "- ", VbNewLine + "• ")

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Question by:hankknight
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5 Comments
 
LVL 83

Assisted Solution

by:CodeCruiser
CodeCruiser earned 166 total points
ID: 37835408
Its bacause you have "VbNewLine" in the expression.
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LVL 6

Assisted Solution

by:yawkey13
yawkey13 earned 168 total points
ID: 37835431
Regex.Replace(input, "^- ", "• ") will get the first one.  The easiest would be to just call both.

input = RegularExpressions.Regex.Replace(input, "^- ", "• ") ;
input = RegularExpressions.Regex.Replace(input, VbNewLine + "- ", VbNewLine + "• ");
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LVL 8

Expert Comment

by:PagodNaUtak
ID: 37835450
The reason why it does not work in the first line is becuase the first does not contain any carriage return or new line. Your code replaces only the character that is VbNewLine with "- ". As a work around append try the below code:

Approach one:
input = "•" + RegularExpressions.Regex.Replace(input, VbNewLine + "- ", VbNewLine + "• ")

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Approach two:
input = string.Format("{0}{1} {2},"VbNewLine, "-", input)
input = RegularExpressions.Regex.Replace(input, VbNewLine + "- ", VbNewLine + "• ")
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LVL 8

Expert Comment

by:PagodNaUtak
ID: 37835453
Typo erro, approach two should be like this:

Approach two:
input = string.Format("{0}{1} {2}"VbNewLine, "-", input)
input = RegularExpressions.Regex.Replace(input, VbNewLine + "- ", VbNewLine + "• ")
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LVL 8

Accepted Solution

by:
PagodNaUtak earned 166 total points
ID: 37835457
Typo error, approach two should be like this:

Approach two:
input = string.Format("{0}{1} {2}", VbNewLine, "-", input)
input = RegularExpressions.Regex.Replace(input, VbNewLine + "- ", VbNewLine + "• ")
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